The Sankaku Yashiki House, completed in 1980 in Iruma, Saitama Prefecture, represents a distinctive residential design by architect Kokoma-gura. This innovative single-family dwelling takes its name from its striking triangular form, which creates a unique geometric composition that challenges conventional residential architecture. The house exemplifies the experimental design philosophy of the 1980s, combining bold spatial geometry with functional living spaces. Its distinctive silhouette and thoughtful architectural approach make it a notable example of contemporary residential architecture for those interested in innovative design solutions and geometric forms in domestic architecture.